Starting to love iOS 4, so many things to love, so hard to choose. But the first item on my list is iOS 4’s new folders feature. So many apps on my iPhone and everything has been spread over several pages. Now, it’s all on my home screen in a nice little folder.

Something worth noting is that you don’t need a Twitter account to enjoy this application. Browsing trends, reading Top Tweets, finding popular users, and checking out public tweets geographically nearby are all possible immediately upon download.

While I won’t be giving up my copy of iBird Pro for Audubon’s Bird program, these Audubon apps offer more options for those who explore outdoors, including field guides for trees, plants, and mammals. All are great tools for helping you discover new species and figure out what you’re seeing in the wild or your own backyard.